forked from Minki/linux
65e4345c8e
The LIS3LV02 has a special bit that need to be set to get the
read values left aligned. Before this patch we get gibberish
like this:
iio_generic_buffer -a -c10 -n lis3lv02dl_accel
(...)
0.000000 -0.010042 -0.642688 19155832931907
0.000000 -0.010042 -0.642688 19155858751073
Which is because we read a raw value for 1g as 64 which is
the nominal 1024 for 1g shifted 4 bits to the left by being
right-aligned rather than left aligned.
Since all other sensors are left aligned, add some code to
set the special DAS (data alignment setting) bit to 1 so that
the right value is now read like this:
iio_generic_buffer -a -c10 -n lis3lv02dl_accel
(...)
0.000000 -0.147095 -10.120135 24761614364956
-0.029419 -0.176514 -10.120135 24761631624540
The scaling was weird as well: we have a gain of 1000 for 1g
and 3000 for 6g. I don't even remember how I came up with the
old values but they are wrong.
Fixes: 3acddf74f8 ("iio: st-sensors: add support for lis3lv02d accelerometer")
Cc: Lorenzo Bianconi <lorenzo.bianconi@st.com>
Cc: Giuseppe Barba <giuseppe.barba@st.com>
Cc: Denis Ciocca <denis.ciocca@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
796 lines
18 KiB
C
796 lines
18 KiB
C
/*
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* STMicroelectronics accelerometers driver
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*
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* Copyright 2012-2013 STMicroelectronics Inc.
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*
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* Denis Ciocca <denis.ciocca@st.com>
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*
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* Licensed under the GPL-2.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/mutex.h>
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#include <linux/interrupt.h>
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#include <linux/i2c.h>
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#include <linux/gpio.h>
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#include <linux/irq.h>
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#include <linux/iio/iio.h>
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#include <linux/iio/sysfs.h>
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#include <linux/iio/trigger.h>
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#include <linux/iio/buffer.h>
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#include <linux/iio/common/st_sensors.h>
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#include "st_accel.h"
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#define ST_ACCEL_NUMBER_DATA_CHANNELS 3
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/* DEFAULT VALUE FOR SENSORS */
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#define ST_ACCEL_DEFAULT_OUT_X_L_ADDR 0x28
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#define ST_ACCEL_DEFAULT_OUT_Y_L_ADDR 0x2a
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#define ST_ACCEL_DEFAULT_OUT_Z_L_ADDR 0x2c
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/* FULLSCALE */
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#define ST_ACCEL_FS_AVL_2G 2
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#define ST_ACCEL_FS_AVL_4G 4
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#define ST_ACCEL_FS_AVL_6G 6
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#define ST_ACCEL_FS_AVL_8G 8
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#define ST_ACCEL_FS_AVL_16G 16
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#define ST_ACCEL_FS_AVL_100G 100
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#define ST_ACCEL_FS_AVL_200G 200
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#define ST_ACCEL_FS_AVL_400G 400
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static const struct iio_chan_spec st_accel_8bit_channels[] = {
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ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
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BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
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ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 8, 8,
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ST_ACCEL_DEFAULT_OUT_X_L_ADDR+1),
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ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
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BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
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ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 8, 8,
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ST_ACCEL_DEFAULT_OUT_Y_L_ADDR+1),
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ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
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BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
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ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 8, 8,
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ST_ACCEL_DEFAULT_OUT_Z_L_ADDR+1),
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IIO_CHAN_SOFT_TIMESTAMP(3)
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};
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static const struct iio_chan_spec st_accel_12bit_channels[] = {
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ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
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BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
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ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 12, 16,
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ST_ACCEL_DEFAULT_OUT_X_L_ADDR),
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ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
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BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
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ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 12, 16,
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ST_ACCEL_DEFAULT_OUT_Y_L_ADDR),
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ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
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BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
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ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 12, 16,
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ST_ACCEL_DEFAULT_OUT_Z_L_ADDR),
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IIO_CHAN_SOFT_TIMESTAMP(3)
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};
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static const struct iio_chan_spec st_accel_16bit_channels[] = {
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ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
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BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
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ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 16, 16,
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ST_ACCEL_DEFAULT_OUT_X_L_ADDR),
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ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
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BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
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ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 16, 16,
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ST_ACCEL_DEFAULT_OUT_Y_L_ADDR),
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ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
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BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
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ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 16, 16,
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ST_ACCEL_DEFAULT_OUT_Z_L_ADDR),
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IIO_CHAN_SOFT_TIMESTAMP(3)
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};
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static const struct st_sensor_settings st_accel_sensors_settings[] = {
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{
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.wai = 0x33,
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.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
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.sensors_supported = {
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[0] = LIS3DH_ACCEL_DEV_NAME,
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[1] = LSM303DLHC_ACCEL_DEV_NAME,
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[2] = LSM330D_ACCEL_DEV_NAME,
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[3] = LSM330DL_ACCEL_DEV_NAME,
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[4] = LSM330DLC_ACCEL_DEV_NAME,
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[5] = LSM303AGR_ACCEL_DEV_NAME,
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[6] = LIS2DH12_ACCEL_DEV_NAME,
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},
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.ch = (struct iio_chan_spec *)st_accel_12bit_channels,
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.odr = {
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.addr = 0x20,
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.mask = 0xf0,
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.odr_avl = {
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{ .hz = 1, .value = 0x01, },
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{ .hz = 10, .value = 0x02, },
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{ .hz = 25, .value = 0x03, },
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{ .hz = 50, .value = 0x04, },
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{ .hz = 100, .value = 0x05, },
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{ .hz = 200, .value = 0x06, },
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{ .hz = 400, .value = 0x07, },
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{ .hz = 1600, .value = 0x08, },
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},
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},
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.pw = {
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.addr = 0x20,
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.mask = 0xf0,
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.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
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},
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.enable_axis = {
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.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
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.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
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},
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.fs = {
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.addr = 0x23,
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.mask = 0x30,
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.fs_avl = {
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[0] = {
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.num = ST_ACCEL_FS_AVL_2G,
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.value = 0x00,
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.gain = IIO_G_TO_M_S_2(1000),
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},
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[1] = {
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.num = ST_ACCEL_FS_AVL_4G,
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.value = 0x01,
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.gain = IIO_G_TO_M_S_2(2000),
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},
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[2] = {
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.num = ST_ACCEL_FS_AVL_8G,
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.value = 0x02,
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.gain = IIO_G_TO_M_S_2(4000),
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},
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[3] = {
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.num = ST_ACCEL_FS_AVL_16G,
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.value = 0x03,
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.gain = IIO_G_TO_M_S_2(12000),
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},
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},
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},
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.bdu = {
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.addr = 0x23,
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.mask = 0x80,
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},
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.drdy_irq = {
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.addr = 0x22,
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.mask_int1 = 0x10,
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.mask_int2 = 0x08,
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.addr_ihl = 0x25,
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.mask_ihl = 0x02,
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.addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
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},
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.multi_read_bit = true,
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.bootime = 2,
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},
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{
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.wai = 0x32,
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.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
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.sensors_supported = {
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[0] = LIS331DLH_ACCEL_DEV_NAME,
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[1] = LSM303DL_ACCEL_DEV_NAME,
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[2] = LSM303DLH_ACCEL_DEV_NAME,
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[3] = LSM303DLM_ACCEL_DEV_NAME,
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},
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.ch = (struct iio_chan_spec *)st_accel_12bit_channels,
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.odr = {
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.addr = 0x20,
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.mask = 0x18,
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.odr_avl = {
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{ .hz = 50, .value = 0x00, },
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{ .hz = 100, .value = 0x01, },
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{ .hz = 400, .value = 0x02, },
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{ .hz = 1000, .value = 0x03, },
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},
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},
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.pw = {
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.addr = 0x20,
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.mask = 0xe0,
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.value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
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.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
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},
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.enable_axis = {
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.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
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.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
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},
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.fs = {
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.addr = 0x23,
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.mask = 0x30,
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.fs_avl = {
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[0] = {
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.num = ST_ACCEL_FS_AVL_2G,
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.value = 0x00,
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.gain = IIO_G_TO_M_S_2(1000),
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},
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[1] = {
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.num = ST_ACCEL_FS_AVL_4G,
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.value = 0x01,
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.gain = IIO_G_TO_M_S_2(2000),
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},
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[2] = {
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.num = ST_ACCEL_FS_AVL_8G,
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.value = 0x03,
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.gain = IIO_G_TO_M_S_2(3900),
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},
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},
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},
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.bdu = {
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.addr = 0x23,
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.mask = 0x80,
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},
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.drdy_irq = {
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.addr = 0x22,
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.mask_int1 = 0x02,
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.mask_int2 = 0x10,
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.addr_ihl = 0x22,
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.mask_ihl = 0x80,
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.addr_od = 0x22,
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.mask_od = 0x40,
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.addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
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},
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.multi_read_bit = true,
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.bootime = 2,
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},
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{
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.wai = 0x40,
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.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
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.sensors_supported = {
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[0] = LSM330_ACCEL_DEV_NAME,
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},
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.ch = (struct iio_chan_spec *)st_accel_16bit_channels,
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.odr = {
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.addr = 0x20,
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.mask = 0xf0,
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.odr_avl = {
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{ .hz = 3, .value = 0x01, },
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{ .hz = 6, .value = 0x02, },
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{ .hz = 12, .value = 0x03, },
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{ .hz = 25, .value = 0x04, },
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{ .hz = 50, .value = 0x05, },
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{ .hz = 100, .value = 0x06, },
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{ .hz = 200, .value = 0x07, },
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{ .hz = 400, .value = 0x08, },
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{ .hz = 800, .value = 0x09, },
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{ .hz = 1600, .value = 0x0a, },
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},
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},
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.pw = {
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.addr = 0x20,
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.mask = 0xf0,
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.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
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},
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.enable_axis = {
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.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
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.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
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},
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.fs = {
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.addr = 0x24,
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.mask = 0x38,
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.fs_avl = {
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[0] = {
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.num = ST_ACCEL_FS_AVL_2G,
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.value = 0x00,
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.gain = IIO_G_TO_M_S_2(61),
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},
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[1] = {
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.num = ST_ACCEL_FS_AVL_4G,
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.value = 0x01,
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.gain = IIO_G_TO_M_S_2(122),
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},
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[2] = {
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.num = ST_ACCEL_FS_AVL_6G,
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.value = 0x02,
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.gain = IIO_G_TO_M_S_2(183),
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},
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[3] = {
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.num = ST_ACCEL_FS_AVL_8G,
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.value = 0x03,
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.gain = IIO_G_TO_M_S_2(244),
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},
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[4] = {
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.num = ST_ACCEL_FS_AVL_16G,
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.value = 0x04,
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.gain = IIO_G_TO_M_S_2(732),
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},
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},
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},
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.bdu = {
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.addr = 0x20,
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.mask = 0x08,
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},
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.drdy_irq = {
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.addr = 0x23,
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.mask_int1 = 0x80,
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.mask_int2 = 0x00,
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.addr_ihl = 0x23,
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.mask_ihl = 0x40,
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.addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
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.ig1 = {
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.en_addr = 0x23,
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.en_mask = 0x08,
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},
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},
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.multi_read_bit = false,
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.bootime = 2,
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},
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{
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.wai = 0x3a,
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.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
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.sensors_supported = {
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[0] = LIS3LV02DL_ACCEL_DEV_NAME,
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},
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.ch = (struct iio_chan_spec *)st_accel_12bit_channels,
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.odr = {
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.addr = 0x20,
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.mask = 0x30, /* DF1 and DF0 */
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.odr_avl = {
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{ .hz = 40, .value = 0x00, },
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{ .hz = 160, .value = 0x01, },
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{ .hz = 640, .value = 0x02, },
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{ .hz = 2560, .value = 0x03, },
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},
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},
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.pw = {
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.addr = 0x20,
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.mask = 0xc0,
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.value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
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.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
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},
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.enable_axis = {
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.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
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.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
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},
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.fs = {
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.addr = 0x21,
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.mask = 0x80,
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.fs_avl = {
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[0] = {
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.num = ST_ACCEL_FS_AVL_2G,
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.value = 0x00,
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.gain = IIO_G_TO_M_S_2(1000),
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},
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[1] = {
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.num = ST_ACCEL_FS_AVL_6G,
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.value = 0x01,
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.gain = IIO_G_TO_M_S_2(3000),
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},
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},
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},
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.bdu = {
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.addr = 0x21,
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.mask = 0x40,
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},
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/*
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* Data Alignment Setting - needs to be set to get
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* left-justified data like all other sensors.
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*/
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.das = {
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.addr = 0x21,
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.mask = 0x01,
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},
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.drdy_irq = {
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.addr = 0x21,
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.mask_int1 = 0x04,
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.addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
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},
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.multi_read_bit = true,
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.bootime = 2, /* guess */
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},
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{
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.wai = 0x3b,
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.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
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.sensors_supported = {
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[0] = LIS331DL_ACCEL_DEV_NAME,
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},
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.ch = (struct iio_chan_spec *)st_accel_8bit_channels,
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.odr = {
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.addr = 0x20,
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.mask = 0x80,
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.odr_avl = {
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{ .hz = 100, .value = 0x00, },
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{ .hz = 400, .value = 0x01, },
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},
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},
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.pw = {
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.addr = 0x20,
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.mask = 0x40,
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.value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
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.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
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},
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.enable_axis = {
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.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
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.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
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},
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.fs = {
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.addr = 0x20,
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.mask = 0x20,
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/*
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* TODO: check these resulting gain settings, these are
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* not in the datsheet
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*/
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.fs_avl = {
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[0] = {
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.num = ST_ACCEL_FS_AVL_2G,
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.value = 0x00,
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.gain = IIO_G_TO_M_S_2(18000),
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},
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[1] = {
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.num = ST_ACCEL_FS_AVL_8G,
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|
.value = 0x01,
|
|
.gain = IIO_G_TO_M_S_2(72000),
|
|
},
|
|
},
|
|
},
|
|
.drdy_irq = {
|
|
.addr = 0x22,
|
|
.mask_int1 = 0x04,
|
|
.mask_int2 = 0x20,
|
|
.addr_ihl = 0x22,
|
|
.mask_ihl = 0x80,
|
|
.addr_od = 0x22,
|
|
.mask_od = 0x40,
|
|
.addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
|
|
},
|
|
.multi_read_bit = false,
|
|
.bootime = 2, /* guess */
|
|
},
|
|
{
|
|
.wai = 0x32,
|
|
.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
|
|
.sensors_supported = {
|
|
[0] = H3LIS331DL_DRIVER_NAME,
|
|
},
|
|
.ch = (struct iio_chan_spec *)st_accel_12bit_channels,
|
|
.odr = {
|
|
.addr = 0x20,
|
|
.mask = 0x18,
|
|
.odr_avl = {
|
|
{ .hz = 50, .value = 0x00, },
|
|
{ .hz = 100, .value = 0x01, },
|
|
{ .hz = 400, .value = 0x02, },
|
|
{ .hz = 1000, .value = 0x03, },
|
|
},
|
|
},
|
|
.pw = {
|
|
.addr = 0x20,
|
|
.mask = 0x20,
|
|
.value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
|
|
.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
|
|
},
|
|
.enable_axis = {
|
|
.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
|
|
.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
|
|
},
|
|
.fs = {
|
|
.addr = 0x23,
|
|
.mask = 0x30,
|
|
.fs_avl = {
|
|
[0] = {
|
|
.num = ST_ACCEL_FS_AVL_100G,
|
|
.value = 0x00,
|
|
.gain = IIO_G_TO_M_S_2(49000),
|
|
},
|
|
[1] = {
|
|
.num = ST_ACCEL_FS_AVL_200G,
|
|
.value = 0x01,
|
|
.gain = IIO_G_TO_M_S_2(98000),
|
|
},
|
|
[2] = {
|
|
.num = ST_ACCEL_FS_AVL_400G,
|
|
.value = 0x03,
|
|
.gain = IIO_G_TO_M_S_2(195000),
|
|
},
|
|
},
|
|
},
|
|
.bdu = {
|
|
.addr = 0x23,
|
|
.mask = 0x80,
|
|
},
|
|
.drdy_irq = {
|
|
.addr = 0x22,
|
|
.mask_int1 = 0x02,
|
|
.mask_int2 = 0x10,
|
|
.addr_ihl = 0x22,
|
|
.mask_ihl = 0x80,
|
|
},
|
|
.multi_read_bit = true,
|
|
.bootime = 2,
|
|
},
|
|
{
|
|
/* No WAI register present */
|
|
.sensors_supported = {
|
|
[0] = LIS3L02DQ_ACCEL_DEV_NAME,
|
|
},
|
|
.ch = (struct iio_chan_spec *)st_accel_12bit_channels,
|
|
.odr = {
|
|
.addr = 0x20,
|
|
.mask = 0x30,
|
|
.odr_avl = {
|
|
{ .hz = 280, .value = 0x00, },
|
|
{ .hz = 560, .value = 0x01, },
|
|
{ .hz = 1120, .value = 0x02, },
|
|
{ .hz = 4480, .value = 0x03, },
|
|
},
|
|
},
|
|
.pw = {
|
|
.addr = 0x20,
|
|
.mask = 0xc0,
|
|
.value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
|
|
.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
|
|
},
|
|
.enable_axis = {
|
|
.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
|
|
.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
|
|
},
|
|
.fs = {
|
|
.fs_avl = {
|
|
[0] = {
|
|
.num = ST_ACCEL_FS_AVL_2G,
|
|
.gain = IIO_G_TO_M_S_2(488),
|
|
},
|
|
},
|
|
},
|
|
/*
|
|
* The part has a BDU bit but if set the data is never
|
|
* updated so don't set it.
|
|
*/
|
|
.bdu = {
|
|
},
|
|
.drdy_irq = {
|
|
.addr = 0x21,
|
|
.mask_int1 = 0x04,
|
|
.addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
|
|
},
|
|
.multi_read_bit = false,
|
|
.bootime = 2,
|
|
},
|
|
{
|
|
.wai = 0x33,
|
|
.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
|
|
.sensors_supported = {
|
|
[0] = LNG2DM_ACCEL_DEV_NAME,
|
|
},
|
|
.ch = (struct iio_chan_spec *)st_accel_8bit_channels,
|
|
.odr = {
|
|
.addr = 0x20,
|
|
.mask = 0xf0,
|
|
.odr_avl = {
|
|
{ .hz = 1, .value = 0x01, },
|
|
{ .hz = 10, .value = 0x02, },
|
|
{ .hz = 25, .value = 0x03, },
|
|
{ .hz = 50, .value = 0x04, },
|
|
{ .hz = 100, .value = 0x05, },
|
|
{ .hz = 200, .value = 0x06, },
|
|
{ .hz = 400, .value = 0x07, },
|
|
{ .hz = 1600, .value = 0x08, },
|
|
},
|
|
},
|
|
.pw = {
|
|
.addr = 0x20,
|
|
.mask = 0xf0,
|
|
.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
|
|
},
|
|
.enable_axis = {
|
|
.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
|
|
.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
|
|
},
|
|
.fs = {
|
|
.addr = 0x23,
|
|
.mask = 0x30,
|
|
.fs_avl = {
|
|
[0] = {
|
|
.num = ST_ACCEL_FS_AVL_2G,
|
|
.value = 0x00,
|
|
.gain = IIO_G_TO_M_S_2(15600),
|
|
},
|
|
[1] = {
|
|
.num = ST_ACCEL_FS_AVL_4G,
|
|
.value = 0x01,
|
|
.gain = IIO_G_TO_M_S_2(31200),
|
|
},
|
|
[2] = {
|
|
.num = ST_ACCEL_FS_AVL_8G,
|
|
.value = 0x02,
|
|
.gain = IIO_G_TO_M_S_2(62500),
|
|
},
|
|
[3] = {
|
|
.num = ST_ACCEL_FS_AVL_16G,
|
|
.value = 0x03,
|
|
.gain = IIO_G_TO_M_S_2(187500),
|
|
},
|
|
},
|
|
},
|
|
.drdy_irq = {
|
|
.addr = 0x22,
|
|
.mask_int1 = 0x10,
|
|
.mask_int2 = 0x08,
|
|
.addr_ihl = 0x25,
|
|
.mask_ihl = 0x02,
|
|
.addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
|
|
},
|
|
.multi_read_bit = true,
|
|
.bootime = 2,
|
|
},
|
|
};
|
|
|
|
static int st_accel_read_raw(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *ch, int *val,
|
|
int *val2, long mask)
|
|
{
|
|
int err;
|
|
struct st_sensor_data *adata = iio_priv(indio_dev);
|
|
|
|
switch (mask) {
|
|
case IIO_CHAN_INFO_RAW:
|
|
err = st_sensors_read_info_raw(indio_dev, ch, val);
|
|
if (err < 0)
|
|
goto read_error;
|
|
|
|
return IIO_VAL_INT;
|
|
case IIO_CHAN_INFO_SCALE:
|
|
*val = adata->current_fullscale->gain / 1000000;
|
|
*val2 = adata->current_fullscale->gain % 1000000;
|
|
return IIO_VAL_INT_PLUS_MICRO;
|
|
case IIO_CHAN_INFO_SAMP_FREQ:
|
|
*val = adata->odr;
|
|
return IIO_VAL_INT;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
read_error:
|
|
return err;
|
|
}
|
|
|
|
static int st_accel_write_raw(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan, int val, int val2, long mask)
|
|
{
|
|
int err;
|
|
|
|
switch (mask) {
|
|
case IIO_CHAN_INFO_SCALE: {
|
|
int gain;
|
|
|
|
gain = val * 1000000 + val2;
|
|
err = st_sensors_set_fullscale_by_gain(indio_dev, gain);
|
|
break;
|
|
}
|
|
case IIO_CHAN_INFO_SAMP_FREQ:
|
|
if (val2)
|
|
return -EINVAL;
|
|
mutex_lock(&indio_dev->mlock);
|
|
err = st_sensors_set_odr(indio_dev, val);
|
|
mutex_unlock(&indio_dev->mlock);
|
|
return err;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
|
|
static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_accel_scale_available);
|
|
|
|
static struct attribute *st_accel_attributes[] = {
|
|
&iio_dev_attr_sampling_frequency_available.dev_attr.attr,
|
|
&iio_dev_attr_in_accel_scale_available.dev_attr.attr,
|
|
NULL,
|
|
};
|
|
|
|
static const struct attribute_group st_accel_attribute_group = {
|
|
.attrs = st_accel_attributes,
|
|
};
|
|
|
|
static const struct iio_info accel_info = {
|
|
.driver_module = THIS_MODULE,
|
|
.attrs = &st_accel_attribute_group,
|
|
.read_raw = &st_accel_read_raw,
|
|
.write_raw = &st_accel_write_raw,
|
|
.debugfs_reg_access = &st_sensors_debugfs_reg_access,
|
|
};
|
|
|
|
#ifdef CONFIG_IIO_TRIGGER
|
|
static const struct iio_trigger_ops st_accel_trigger_ops = {
|
|
.owner = THIS_MODULE,
|
|
.set_trigger_state = ST_ACCEL_TRIGGER_SET_STATE,
|
|
.validate_device = st_sensors_validate_device,
|
|
};
|
|
#define ST_ACCEL_TRIGGER_OPS (&st_accel_trigger_ops)
|
|
#else
|
|
#define ST_ACCEL_TRIGGER_OPS NULL
|
|
#endif
|
|
|
|
int st_accel_common_probe(struct iio_dev *indio_dev)
|
|
{
|
|
struct st_sensor_data *adata = iio_priv(indio_dev);
|
|
int irq = adata->get_irq_data_ready(indio_dev);
|
|
int err;
|
|
|
|
indio_dev->modes = INDIO_DIRECT_MODE;
|
|
indio_dev->info = &accel_info;
|
|
mutex_init(&adata->tb.buf_lock);
|
|
|
|
err = st_sensors_power_enable(indio_dev);
|
|
if (err)
|
|
return err;
|
|
|
|
err = st_sensors_check_device_support(indio_dev,
|
|
ARRAY_SIZE(st_accel_sensors_settings),
|
|
st_accel_sensors_settings);
|
|
if (err < 0)
|
|
goto st_accel_power_off;
|
|
|
|
adata->num_data_channels = ST_ACCEL_NUMBER_DATA_CHANNELS;
|
|
adata->multiread_bit = adata->sensor_settings->multi_read_bit;
|
|
indio_dev->channels = adata->sensor_settings->ch;
|
|
indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;
|
|
|
|
adata->current_fullscale = (struct st_sensor_fullscale_avl *)
|
|
&adata->sensor_settings->fs.fs_avl[0];
|
|
adata->odr = adata->sensor_settings->odr.odr_avl[0].hz;
|
|
|
|
if (!adata->dev->platform_data)
|
|
adata->dev->platform_data =
|
|
(struct st_sensors_platform_data *)&default_accel_pdata;
|
|
|
|
err = st_sensors_init_sensor(indio_dev, adata->dev->platform_data);
|
|
if (err < 0)
|
|
goto st_accel_power_off;
|
|
|
|
err = st_accel_allocate_ring(indio_dev);
|
|
if (err < 0)
|
|
goto st_accel_power_off;
|
|
|
|
if (irq > 0) {
|
|
err = st_sensors_allocate_trigger(indio_dev,
|
|
ST_ACCEL_TRIGGER_OPS);
|
|
if (err < 0)
|
|
goto st_accel_probe_trigger_error;
|
|
}
|
|
|
|
err = iio_device_register(indio_dev);
|
|
if (err)
|
|
goto st_accel_device_register_error;
|
|
|
|
dev_info(&indio_dev->dev, "registered accelerometer %s\n",
|
|
indio_dev->name);
|
|
|
|
return 0;
|
|
|
|
st_accel_device_register_error:
|
|
if (irq > 0)
|
|
st_sensors_deallocate_trigger(indio_dev);
|
|
st_accel_probe_trigger_error:
|
|
st_accel_deallocate_ring(indio_dev);
|
|
st_accel_power_off:
|
|
st_sensors_power_disable(indio_dev);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(st_accel_common_probe);
|
|
|
|
void st_accel_common_remove(struct iio_dev *indio_dev)
|
|
{
|
|
struct st_sensor_data *adata = iio_priv(indio_dev);
|
|
|
|
st_sensors_power_disable(indio_dev);
|
|
|
|
iio_device_unregister(indio_dev);
|
|
if (adata->get_irq_data_ready(indio_dev) > 0)
|
|
st_sensors_deallocate_trigger(indio_dev);
|
|
|
|
st_accel_deallocate_ring(indio_dev);
|
|
}
|
|
EXPORT_SYMBOL(st_accel_common_remove);
|
|
|
|
MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
|
|
MODULE_DESCRIPTION("STMicroelectronics accelerometers driver");
|
|
MODULE_LICENSE("GPL v2");
|